https://devzone.nordicsemi.com/f/nordic-q-a/21443/update-data-in-an-advertising-packetI use next init in static void advertising_init(bool bonding) ble_advdata_manuf_data_t manuf_data; manuf_data.company_identifier = COMPANY_ID ; manuf_data.data.p_data = &amp;adv_data_batt_level[0]; manuf_data.data.size = 1; I can observe thisen-USTelligent Community 13Tue, 18 Apr 2017 18:12:46 GMThttps://devzone.nordicsemi.com/thread/84108?ContentTypeID=1Tue, 18 Apr 2017 18:12:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0f88b55e-f159-4de7-a1df-b19e63848732endnode<p>You can use <code>ble_radio_notification</code> module from SDK, it gives you callback before and after each radio Tx/Rx slot so if you do just advertisement it solves your problem. If you combine advertisement with parallel connections you will need to do more magic around, typically to use timer with interval close to adv. interval...</p> <p><a href="https://devzone.nordicsemi.com/question/56603/nrf-master-control-panel-for-android-crashes-when-displaying-details-of-fast-advertising-peripheral/?answer=64925#post-id-64925">Here is an example</a> how to make each adv. packet different.</p><div style="clear:both;"></div>